Lid for a flat back bucket



FIG. 1 is a front perspective view of a lid for a flat back bucket showing my new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a rear perspective view thereof.

The dashed broken lines in the figures depict portions of the lid for a flat back bucket that form no part of the claimed design. 

CLAIM The ornamental design for a lid for a flat back bucket, as shown and described. 